The structure and evolution of M51-type galaxies

  title={The structure and evolution of M51-type galaxies},
  author={V.P.Reshetnikov and S.A.Klimanov},
We discuss the integrated kinematic parameters of 20 M51-type binary galaxies. A comparison of the orbital masses of the galaxies with the sum of the individual masses suggests that moderately massive dark halos surround bright spiral galaxies. The relative velocities of the galaxies in binary systems were found to decrease with increasing relative luminosity of the satellite. We obtained evidence that the Tully-Fisher relation for binary members could be flatter than that for local field… Expand